s 45 Partnerships.
(1) The registration under this Act of persons— (a) carrying on a business in partnership, ... (b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . may be in the name of the firm; and no account shall be taken, in determining for any purpose of this Act whether goods or services are supplied to or by such persons ..., of any change in the partnership. (2) Without prejudice to section 36 of the Partnership Act 1890 (rights of persons dealing with firm against apparent members of firm), until the date on which a change in the partnership is notified to the Commissioners a person who has ceased to be a member of a partnership shall be regarded as continuing to be a partner for the purposes of this Act and, in particular, for the purpose of any liability for VAT on the supply of goods or services by the partnership .... (3) Where a person ceases to be a member of a partnership during a prescribed accounting period (or is treated as so doing by virtue of subsection (2) above) any notice, whether of assessment or otherwise, which is served on the partnership and relates to, or to any matter arising in, that period or any earlier period during the whole or part of which he was a member of the partnership shall be treated as served also on him. (4) Without prejudice to section 16 of the Partnership Act 1890 (notice to acting partner to be notice to the firm) any notice, whether of assessment or otherwise, which is addressed to a partnership by the name in which it is registered by virtue of subsection (1) above and is served in accordance with this Act shall be treated for the purposes of this Act as served on the partnership and, accordingly, where subsection (3) above applies, as served also on the former partner. (5) Subsections (1) and (3) above shall not affect the extent to which, under section 9 of the Partnership Act 1890, a partner is liable for VAT owed by the firm; but where a person is a partner in a firm during part only of a prescribed accounting period, his liability for VAT on the supply by the firm of goods or services during that accounting period ... shall be such proportion of the firm’s liability as may be just.